How to loop through array parameter via Powershell task in Azure DevOps - powershell

Question

I have a parameter that consists of two executable paths and I want to loop through it to sign each executable. For this, I use a PowerShell#2 task that is passed via a template in Azure DevOps.
I don't seem to loop correctly through the executable array via any of the methods I've tried in my template code.
What is the best way to loop through the array parameter? Thanks for your help.
Here is my latest code:
parameters:
- name: executableList
type: object
default: []
steps:
- task: PowerShell#2
displayName: 'Sign executables'
inputs:
targetType: 'inline'
script: |
#...more code here
${{ foreach (executable in parameters.executableList) }} {
& $signingExecutable sign /sm /s My /n "Sign Text" /tr http://rfc3161timestamp.globalsign.com/advanced /td sha256 /fd sha256 "$(Pipeline.Workspace)$executable"
          }
Error: While scanning a simple key, could not find expected ':'.

Answer 1

You can try convertToJson function. Small example:
parameters:
- name: myArray
type: object
default:
- "1"
- "2"
- "4"
- "8"
- "16"
steps:
- task: PowerShell#2
displayName: 'Sign executables'
inputs:
targetType: 'inline'
script: |
$mayarrstr= #"
${{ convertToJson(parameters.myArray) }}
"#
$myarr = ConvertFrom-Json $mayarrstr
foreach ($myvalue in $myarr)
{
Write-Host "Value: " $myvalue
}